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No. 626,840. Patented June l3, I899. P. F. mAccALLum.

APPARATUS FOR INJEGTING F INTO BU N CHAMBERS OF INTERNAL G STIO GI Modem (Application filed De. 22, 1897.) 2 3|199t$ 5h99t C .lx\.\\ 1

No. 626,840. Patented June l3, I899.

P. F. mAc cALLum. FUEL INTO COMBUSTION CHAMBERS OF INTERNAL couausmn enemas.

(Application filed Dec. 22, 1897.)

2 Sheets-$heet 2.

APPARATUS FOR INJEGTING (No Model.)

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UNITED STATES PATENT OFFICE.

PATRICK FRASER MAooALLUM, or HELENSBURGH, SCOTLAND.

APPARATUS FOR'INJECTING FUEL INTO COMBUSTION-CHAMBERS 0F INTERNAL-COMBUSTION ENGINES.

SPECIFICATION forming part of Letters Patent No. 626,840, dated June 13,1899. 7

Application filed December 22, 1897. Serial No. 662,994. (No model.)

To all whom it may concern,-

Be it known that I, PATRIcK FRASER MAo- CALLUM, engineer,of Fairbank, Helensburgh, in the county of Dumbarton, Scotland, have invented certain new and useful Improvements in Apparatus for Injecting Fuel into Combustion-Chambers of Internal-Combustion Engines and the Like, (which have been patented in Great Britain by Letters Patent, dated September 15, 1894, No. 17,549; in France, dated December 14, 1895, No. 252,473; in Belgium. dated December 14, 1895, No. 118,848, and in Germany, dated December 20, 1895, No. 89,715,) of which the following is a specification.

This invention relates to apparatus for injecting powdered or liquid fuel into the combusti'on chambers or cylinders of internalcombustion engines, and is also applicable for feeding fuel into gasproducing chambers working under pressure greater than that of the atmosphere.

The apparatus comprises a rotating plate or wheel-shaped disk, which may be called a charge-plate, provided with a number of holes arranged'in a circular row around the center of rotation, each hole being of such dimensions as to contain a working charge of fuel. The f uel-container or supply-hopper is made to cover several of the charge-holes to give' sufficient time for their filling as the charge-plate is moved around. The turninggear is adjusted to bring each charge-hole successively over an opening or passage leading to the combustion chamber or cylinder. The passage is provided with a suitable nonreturn valve to prevent outward escape of gases from the combustion-chamber. The upper part ofthe charge-holeis at the same time brought in line with an opening in connection with a source, of pressure-e. 9., a reservoir containing air or gas under pressure or. with a steam or vapor generator. At the proper moment communication is made with the pressure-reservoir, and the charge of fuel is blown past the non-return valve into the combustion-chamber. The movements of the charge-plate and the air-in j ection valve at the necessary intervals are effected by means of cams and levers or rods or other like contrivances commonly employed in gas and like engine's. These movements may be controlled by governors, so that no advance of the charge-plate or opening of the injection-valve takes place when a given speed is exceeded.

The apparatus is specially adapted for dealing with powdered fuels, such as small coal 5 but it may also be used for liquid fuel.

The invention is illustrated by the accompanying drawings, in which- Figure 1 is a vertical section of the apparatus in line of the passage through which the fuel is led to the combustionchamber or cylinder. Fig. 2 is a section of the apparatus in line of thefuel hopper or container and the center pin around which the charge-plate is rotated. Fig. 3 is a plan of the apparatus with a portion of the top cover-plate removed to show the charge-plate and. the attached rack or ratchet rim by means of which the charge-plate is rotated.

A is the charge-plate, resting upon a supporting-bracket B and closed in above by a cover-plate 0, held down by bolts and springs. The rubbing-faces of all three members are accurately faced and may be lubricated with fine graphite. The supporting-bracket B is shown resting on a water-box D,.inte rposed between it and the combustion-chamber E, and which may be advantageously employed to protect the apparatus from overheating when the upper part of the combustion chamber or cylinder E is not provided with a water-jacket. The passage F, leading from the charge-plate to the combustion-chamber E, is closed by the valve F, supported by a spring and cross-piece.

G is a valve for timing the admission of the injection air, gas, or steam from the pipe or reservoir H, the valve being operated from any moving part of the engine. When compressed air or gas is used as the injecting medium,it may be conveniently supplied from a small air-pump operated from any suitable part of the engine.

The charge-plate may also be rotated in several ways through the center pin J, the pin being secured fast to the charge plate and turning itself in suitable bearings. This method of rotating allows of the charge-plate being boxed in at the sides. 1

The action of the apparatus is as follows: Fuel is fed into the holes L L L in the chargeplate from the fuel-container I, the feeding operation being facilitated by means of an agitator K, working in the hopper, and the charge-plate being rotated intermittently by means ofa pawl engaging the teeth of a ratchet M, secured on the rim of the charge-plate to bring successive charges of fuel over the valve F. At the proper instant the valve G is opened, and the compressed air or gas from the reservoir ll instantly forces the fuel past the valve F into the combustion-chamber E.

The valve F then closes automatically and so Y eifectively protects the charge-plate and Working parts from the heat and pressure generated by the combustion or explosion of the fuel in the chamber or cylinder E.

The apparatus instead of being placed directly above the combustion chamber, as shown in Fig. 1 of the accompanying drawings, may be placed in any other convenient position and connected with the combustionchamber bya pipe or passage, through which the fuel may be injected downward into or across or upward into the combustion chamher or cylinder.

Having now described the invention, what I claim, and desire to secure by Letters Patent, is

into a combustion-chamber consisting of a rotailing charge-plate having a series of chargeorifices disposed in a circular row around the point of rotation, a source of pressure, H, valve G normally closed to retain the pressure, and a valve F normally serving to close the passage to the combustion-cylinder, but adapted to be opened by pressure at the moment of fuel injection.

2. In combination with an internal-combustion engine, a fuel-injecting device composed of a f uel-supply hopper, a rotating chargeplate fitted thereunder and having a series of charge-orifices disposed to receive charges of fuel, an opening in the combustion-chamber, a non-return valve between the combustionchamber and the charge-plate over Which opening the holes in the charge-plate are successively brought by intermittent movement of said charge-plate a source of pressure, an inlet, a valve between the charge-plate and the source of pressure normally closed and adapted When operated to direct a jet under pressure to discharge the fuel from the charge plate into the combustion chamber or cylinder.

3. The combination of bracket 13 having an opening F therein, a rotatable charge-plate A having a circular row of holes L adapted to successively register with said opening,a pivot J for plate A, a cover-plate O and a fuel-container 1 adapted to simultaneously cover several openings L.

4. The combination of. bracket B having an opening F therein, a rotatable charge-plate A having a circular row of holes L adapted to v successively register with said opening,a pivot 1. A aratus for in'ectin" owdered fuel J for plate A, a cover-plate O, a fuel-container I adapted to simultaneously cover several openings L, and an agitator K at the bottom of the fuel-container.

Signed at Glasgow, in the county of Lanark, Scotland, this 7th day of December, 1807. PATRICK FRASER llIAOOALliUM.

Witnesses:

\VALLACE FAIRWEATHER, .lno. ARMSTONG, J unr. 

